This can lead to break-in-two on steep grades with a heavy train and DPU.
The following screenshots are taken when resuming a Scenic sub activity, driving from Merritt towards Berne.
The first screenshot is before the activity resumes. This is the state when the activity was saved. It shows that all engines are in run 8, and are producing close to 100,000 lbs tractive effort. Note that HP is zero and load is 0%.
https://i.imgur.com/WnoTmRl.png
The next screenshot is after resuming (Continue playing). Note that the tractive effort has dropped to about 5000 lbs. The train is rapidly decelerating.
https://i.imgur.com/Y6LhB4R.png
The engine continues revving up, and after another ~ 10 seconds the tractive effort is up to 38,000 lbs.
https://i.imgur.com/emrEtBb.png
Another 10 seconds later the train breaks apart, just behind the lead consist.
Attached is the txt file from the saved activity.

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